<!doctype html>
<html>
    <head></head>
    <body>
        <p id="textcontent"></p>
        <label>Test</label>
        <input type="submit" aria-labelledby="GLUXZipUpdate-announce" onclick="changeText()"/>
        <script>
            function changeText (){
                document.getElementById("textcontent").innerText = "12333";
            }
        </script>
    </body>
</html>